Vacuum glass panel, glass window, and method for producing vacuum glass panel

Abstract

A vacuum glass panel includes a first glass plate, a second glass plate facing the first glass plate, a frame member having a frame shape and bonding the first glass plate to the second glass plate, and a heat reflective film disposed on an inner surface of the first glass plate. A vacuum space is provided between the first glass plate and the second glass plate. The heat reflective film separates the first glass plate from the vacuum space without a gap. The frame member is in contact with the first glass plate.

The invention claimed is: 
     
       1. A method for producing a vacuum glass panel, the method comprising:
 removing, from a first glass body including a first glass plate and a heat reflective film disposed on a first surface of the first glass plate, part of the heat reflective film to form a portion having a frame shape without the heat reflective film; 
 removing the heat reflective film partially from a portion around the center of the first glass body, 
 disposing a first glass adhesive in the portion having the frame shape and formed in the first glass body by partially removing the heat reflective film; 
 disposing a second glass adhesive in the portion formed around the center of the first glass body by partially removing the heat reflective film; 
 disposing a second glass body including a second glass plate to face the first glass body; 
 evacuating a space between the first glass body and the second glass body; 
 bonding the first glass body and the second glass body with the first glass adhesive and the second glass adhesive to form an integrated panel including a vacuum space; and 
 cutting the integrated panel at a location where the vacuum space is not broken to obtain two or more vacuum glass panels. 
 
     
     
       2. The method according to  claim 1 , wherein the first glass adhesive and the second glass adhesive are in contact with the heat reflective film. 
     
     
       3. The method according to  claim 1 , wherein the first glass adhesive melts at a lower temperature than the second glass adhesive. 
     
     
       4. The method according to  claim 3 , wherein when disposing the second glass adhesive in the portion formed around the center of a first glass body by partially removing the heat reflective film the second glass adhesive does not contact the first glass adhesive. 
     
     
       5. The method according to  claim 4 , wherein the first glass adhesive surrounds the second glass adhesive when viewed in plan.